SHAREHOLDER'S EQUITY (Narrative- At-the-market offering program) (Details) - USD ($)	9 Months Ended		12 Months Ended	17 Months Ended
	Sep. 30, 2017		Dec. 31, 2016	Sep. 30, 2017		May 10, 2016
Share-based Goods and Nonemployee Services Transaction [Line Items]
Maximum amount which can be raised under ATM offering program						$ 25,000,000.0
Maximum amount which can be raised under shelf registration statement	$ 4,300,000.0			$ 4,300,000.0
Stock issuance costs under equity distribution agreement as a percent of gross proceeds						3.00%
Issuance expenses	389,000
ATM Offering Program
Share-based Goods and Nonemployee Services Transaction [Line Items]
Maximum amount which can be raised under ATM offering program	25,000,000			25,000,000
Maximum amount which can be raised under shelf registration statement	4,300,000.0			4,300,000.0
Issuance of ordinary shares in an ATM offering of ordinary shares, gross of issuance expenses	9,400,000			14,000,000
Issuance of ordinary shares in an ATM offering of ordinary shares, net of issuance expenses	9,010,000	[1]	$ 4,099,000	13,100,000
Underwriter commission, fees and offering expenses	$ 439,000			907,000
Piper Jaffray | ATM Offering Program
Share-based Goods and Nonemployee Services Transaction [Line Items]
Issuance expenses				$ 420,000
Ordinary Share | ATM Offering Program
Share-based Goods and Nonemployee Services Transaction [Line Items]
Issuance of ordinary shares (in shares)	5,379,908	[1]	692,062	6,071,970	[1]
Issuance of ordinary shares in an ATM offering of ordinary shares, net of issuance expenses	$ 15,000	[1]	$ 2,000
Underwriter commission, fees and offering expenses	$ 439,000	[1]	$ 468,000
Maximum
Share-based Goods and Nonemployee Services Transaction [Line Items]
Stock issuance costs under equity distribution agreement as a percent of gross proceeds						8.00%
Weighted Average | ATM Offering Program
Share-based Goods and Nonemployee Services Transaction [Line Items]
Price per share of shares sold under ATM offering program (in USD per share)	$ 1.76			$ 2.31

[1] (2) See Note 8e to the condensed consolidated financial statements